Congress of Troppau

The Congress of Troppau was a conference of the Holy Alliance (with the United Kingdom and France as observers) that led to the signing of the Protocol of Troppau on 19 November 1820. The representatives of Britain, France, Prussia, the Austrian Empire, and the Russian Empire met at Troppau (Opava, Czech Republic), where Russia, Prussia, and Austria asserted their right to intervene in other countries to oppose revolutions. The British objected to the interventionist policy, just as they had done at the Congress of Aix-la-Chapelle in 1818.